open → closed
From Tony Ross (Microsoft):
Unfortunately I don’t think this will make our bar for a patch update since the issue automatically resolves itself when the user interacts with the control, but I’ll definitely make sure it stays on our radar for the next release.
As for code-based workarounds, there are various ways you can poke the input element itself to get it to it to update if you so desire (updating the value, changing the width of the element inline, assigning the width inline to begin with, etc). These are fairly easy to use on page-by-page basis, but probably not as easy to generically apply as part of a framework like jQuery UI.
Based on that, I'm going to set this back to wontfix.